Photovoltaic and Electroluminescence Characters in Hybrid ZnO and Conjugated Polymer Bulk Heterojunction Devices

Autor:	Chen Yong-Hai, Wang Zhijie, Zeng Xiang-Bo, Xu Ying, Wang Zhan-Guo, Zhou Hui-Ying, Qu Shengchun, Liu Jun-Peng
Rok vydání:	2007
Předmět:	Quenching Materials science business.industry Electron affinity Electric field General Physics and Astronomy Optoelectronics Photovoltaic effect Electron Electroluminescence business Photoinduced electron transfer Polymer solar cell
Zdroj:	Chinese Physics Letters. 24:1350-1353
ISSN:	1741-3540 0256-307X
DOI:	10.1088/0256-307x/24/5/062
Popis:	We report electroluminescence in hybrid ZnO and conjugated polymer poly[2-methoxy-5-(3', 7'-dimethyloctyloxy)-1,4-phenylenevinylene] (MDMO-PPV) bulk heterojuriction photovoltaic cells. Photolummescence quenching experimental results indicate that the ultra,fast photoinduced electron transfer occurs from MDMO-PPV to ZnO under illumination. The ultrafast photoinduced electron transfer effect is induced because ZnO has an electron affinity about 1.2 eV greater than that of MDMO-PPV. Electron 'back transfer' can occur if the interfacial barrier between ZnO and MDMO-PPV can be overcome by applying a substantial electric field. Therefore, electroluminescence action due to the fact that the back transfer effect can be observed in the ZnO:MDMO-PPV devices since a forward bias is applied. The photovoltaic and electroluminescence actions in the same ZnO:MDMO-PPV device can be induced by different injection ways: photoinjection and electrical injection. The devices are expected to provide an opportunity for dual functionality devices with photovoltaic effect and electroluminescence character.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::28a287486733587d614cfd829ede61d9 https://doi.org/10.1088/0256-307x/24/5/062 Zobrazit plný text záznamu